Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (876 KB bytes)

Title: Field performance of timber bridges. 5, Little Salmon Creek stress-laminated deck bridge

Author: Ritter, M. A.; Kainz, J. A.; Porter, G. J.;

Date:

Source: (Research paper FPL ; RP-547):15 p. : ill., maps ; 28 cm.

Publication Series: Research Paper (RP)

Description: The Little Salmon Creek bridge was constructed in November 1988 on the Allegheny National Forest in Pennsylvania. The bridge is a simple span, single-lane, stress-laminated deck superstructure that is approximately 26-ft long and 16-ft wide. The bridge is unique in that it is the first known stress-laminated timber bridge to be constructed of hardwood lumber. The performance of the bridge was monitored continuously for approximately 4 years, beginning at the time of installation. Performance monitoring involved gathering and evaluating data relative to the moisture content of the wood deck, the force level of stressing bars, the deck vertical creep, and the behavior of the bridge under static-load conditions. In addition, comprehensive visual inspections were conducted to assess the overall condition of the structure. Based on field evaluations, the bridge is performing well with no structural deficiencies, although the bridge has developed a slight sag as a result of vertical creep.

Keywords: Bridges, Structural timbers, Laminated wood, Stress analysis, Pennsylvania, Stress lamination

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

XML: View XML

Citation:


Ritter, M. A.; Kainz, J. A.; Porter, G. J. Field performance of timber bridges. 5, Little Salmon Creek stress-laminated deck bridge. (Research paper FPL ; RP-547):15 p. : ill., maps ; 28 cm.

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.